many people were driven to distractionwhen trying to transfer parked names from some registration companies. Broadly speaking, a name can be transferred very rapidly if everyone nvolved has the will to do it. If your name still hasn't been retagged to the new host within a week to ten days of your initial request being made you are entitled to suspect that someone is deliberately or negligently holding up the process.
It's fair to say that the situation has improved cnsiderably over the past few years, and most names now transfer fairly smoothly, although you'll need to keep an eye on the process.
Some companies make a charge to cover transfer administration costs, but this shouldn't be much - the process isn't rocket science.